Vulnerability Analysis Of Earthquake Disaster In Shandong Province

In recent years,human society is facing many challenges such as rapid population expansion,severe shortage of resources,and deteriorating environment.The frequent occurrence of natural disasters is an important aspect of environmental degradation and is increasingly threatening the sustainable development of human society and economy.Affected by geographical location and geological conditions,natural disasters in Shandong Province are widespread and diverse,and earthquake disasters are one of the most serious disasters.As a province with a large population and a large economy,Shandong Province has been repeatedly hit by earthquake disasters in history,which has had a huge impact on Shandong's social economy.However,under the current level of science and technology,grasping the accuracy of temporal and spatial changes in earthquake disasters still cannot meet the objective needs of disaster prevention and reduction.Therefore,it is of great significance to study the degree of social vulnerability,regional differences and influencing factors under the influence of earthquake disasters and to take targeted measures for each region to enhance the defense capabilities of earthquake disasters,reduce the impact of disasters,and reduce the social vulnerability of earthquake disasters.Firstly,this paper analyses the general situation of the research area and the risk of earthquake disaster.Then 34 indicators were selected to construct an indicator system for the social vulnerability assessment of earthquake disasters in Shandong Province.Software such as SPSS and ArcGIS used principal component analysis(PCA)to evaluate and analyze the social vulnerability of earthquake disasters in 17 cities and counties in Shandong Province.The main conclusions are as follows:(1)Shandong Province has a high frequency of earthquake disasters,strong intensity,and a wide range of earthquakes.It is prone to strong earthquakes of M 7 or higher.In terms of time,there is a clear periodicity of activity.Since the 1000 AD,there have been roughly four periods of seismic activity.The duration of each activity period is about 300 years.There are multiple active scenes and peace scenes alternately in each activity period,each scene about 20 years.In space,the earthquakes are mainly concentrated in the fault zone.Among them,the Tancheng-Lujiang fault zone that runs through the north-north-east of Shandong hinterland is the main one.The northern segment and the Zhangjiakou-Bohai fault zone intersect in the Bohai Sea,and these two fault zones range.The majority of earthquakes above M7 in Shandong have been gestated.There are multiple north-west branch faults on the west side of the belt,and most of them have M5-level earthquakes.In addition,the Liaocheng-Lankao fault zone in the the west area of Shandong,the Penglai-Weihai fault in the Jiaodong peninsula,and the Qianliyan fault in the South Yellow Sea are relatively concentrated areas of earthquakes.(2)Using the principal component analysis method to analyze and classify the social vulnerability of the earthquake disasters in 17 cities in Shandong Province,and found that the areas with the highest vulnerability are: Dezhou and Laiwu;the areas with higher vulnerability are: Liaocheng,Heze and Linyi;Qingdao,Weifang,Yantai and Zaozhuang are located in areas of moderate vulnerability;Zibo,Taian,Jining and Rizhao are located in areas of lower vulnerability;Jinan,Dongying,Binzhou and Weihai are located in areas of the lowest vulnerability.The relationship between its spatial distribution pattern and the level of socio-economic development is very close.(3)Based on the principal component analysis and reconstruction index system,and based on the 2015 statistical data,analyze the social vulnerability of earthquake disasters in all counties and districts of Shandong Province and found that: the distribution of vulnerability of each county(area)and its location The distribution of vulnerability of the prefectures is basically the same;however,the level of vulnerability of individual counties and their prefectures and municipalities is quite different.This is mainly due to factors such as the population and the proportion of agriculture in GDP.To sum up,the strength of the social vulnerability of earthquake disasters in Shandong Province is inextricably linked with the level of local social and economic development.The formation of vulnerability is not determined by a certain factor,but the interaction of various factors in the socio-economic system.result.Therefore,the impact of earthquake disasters can be reduced from the socio-economic system dimension to reduce the social vulnerability of disasters.